Home / 420,938.12-631,412.65-140,455.37

Finding the Fourth Proportional to 420,938.12, 631,412.65 and 140,455.37

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Solution

The fourth proportional to 420,938.12, 631,412.65 and 140,455.37 is: 210,684.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,938.12 : 631,412.65 = 140,455.37 : x
  2. Step 2: Convert to fraction form
    420,938.12/631,412.65 = 140,455.37/x
  3. Step 3: Cross multiply
    420,938.12x = 631,412.65 × 140,455.37
  4. Step 4: Simplify right side
    420,938.12x = 88,685,297,378.43
  5. Step 5: Solve for x
    x = 88,685,297,378.43/420,938.12
  6. Step 6: Final answer
    x = 210,684.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.